The Omega Factor (stylized as The Ωmega Factor) is a British television series produced by BBC Scotland in 1979. It was created by Jack Gerson and produced by George Gallaccio, and transmitted in ten weekly episodes between 13 June and 15 August.

Crane joins Department 7 as a means of finding and getting revenge on Edward Drexel (Cyril Luckham), a powerful rogue psychic who is responsible for the death of Crane's wife in an automobile accident. Crane's work with the department, and his own psychic gift, lead Crane to suspect a deadly conspiracy by a mysterious organisation called Omega to take over the world using mind control. The members of Department 7 include physicist Dr. Anne Reynolds (Louise Jameson), an old friend of Crane's wife, and the secretive head of the department, psychiatrist Dr Roy Martindale (John Carlisle). Most episodes see the driven and impetuous Crane in impatient conflict with the cautious Martindale, with Anne (who falls in love with Crane, though she also has a brief relationship with Martindale) caught in the middle. Various subplots develop over the course of the series - notably Crane's hunt for Drexel, his growing suspicions about the Omega conspiracy and his developing relationship with Anne.

Only lasting for one series of ten episodes, The Omega Factor gained an objections of public moralist Mary Whitehouse, who called the episode "Powers of Darkness" "thoroughly evil" because it depicted hypnosis, the supernatural and a man burning to death.[citation needed]

A DVD release has prompted a long overdue re-evaluation.[opinion] The series' combination of science fiction, horror and thriller elements, and its narrative focus on shadowy government departments and conspiracies to gain world domination, as well as the chemistry between James Hazeldine and Louise Jameson's characters, in many ways anticipates the 1990s TV phenomenon The X-Files, while some elements of later episodes (as the conspiracy begins to fight back against Crane) recall The Prisoner.[original research?] Although the final episode resolved several of the subplots, it raised several more issues and its ambiguous ending suggests that a second season was anticipated.[original research?]

A novel by Jack Gerson, telling the story of Crane's hunt for Drexel (a substantially different story from that in the broadcast series, aside from the first episode which the novel duplicated faithfully), was published to accompany the series.

Produced by BBC Scotland, the series was shot on location in Edinburgh (making use of a number of Edinburgh landmarks such as the Royal Mile, Holyrood Park, and Edinburgh Zoo), with studio production conducted in Glasgow. Unlike most BBC programmes of the day, the series was shot almost entirely on videotape (as opposed to the then-common practice of using film for exteriors); nonetheless a few filmed scenes were shot for one episode.

Recurring guest star Natasha Gerson is the daughter of the show's creator. According to her interview for the 2006 DVD release, she auditioned for the role under an assumed name so that the casting agent was not aware of the relation.

The series was originally allotted to run thirteen episodes, but to maintain a certain level of quality, the production was scaled back to ten episodes to allow more money to be budgeted per episode.

On May 3, 2014, Big Finish Productions announced that they would begin producing new audio episodes of The Omega Factor. The press release states that "Big Finish Productions has signed a licence to make brand new audio episodes of Jack Gerson’s chilling supernatural drama The Omega Factor. The original series aired on BBC television in 1979 and starred James Hazeldine as Tom Crane, Louise Jameson as Anne Reynolds and John Carlisle as Roy Martindale, who headed up a secret government agency assigned to investigate the human psyche and paranormal events. In the course of their duties, the team uncovered the plans of the sinister Drexel and a dangerous organisation known only as Omega."[3]